how to make chat website in php code example

Example 1: how to make a online chat html

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8" />
 
        <title>Tuts+ Chat Application</title>
        <meta name="description" content="Tuts+ Chat Application" />
        <link rel="stylesheet" href="style.css" />
    </head>
    <body>
        <div id="wrapper">
            <div id="menu">
                <p class="welcome">Welcome, <b></b></p>
                <p class="logout"><a id="exit" href="#">Exit Chat</a></p>
            </div>
 
            <div id="chatbox"></div>
 
            <form name="message" action="">
                <input name="usermsg" type="text" id="usermsg" />
                <input name="submitmsg" type="submit" id="submitmsg" value="Send" />
            </form>
        </div>
        <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
        <script type="text/javascript">
            // jQuery Document
            $(document).ready(function () {});
        </script>
    </body>
</html>

Example 2: chat session in chatbox in php

var lastTimeID = 0;

$(document).ready(function() {
  $('#btnSend').click( function() {
    sendChatText();
    $('#chatInput').val("");
  });
  startChat();
});

function startChat(){
  setInterval( function() { getChatText(); }, 2000);
}

function getChatText() {
  $.ajax({
    type: "GET",
    url: "/refresh.php?lastTimeID=" + lastTimeID
  }).done( function( data )
  {
    var jsonData = JSON.parse(data);
    var jsonLength = jsonData.results.length;
    var html = "";
    for (var i = 0; i < jsonLength; i++) {
      var result = jsonData.results[i];
      html += '<div style="color:#' + result.color + '">(' + result.chattime + ') <b>' + result.usrname +'</b>: ' + result.chattext + '</div>';
      lastTimeID = result.id;
    }
    $('#view_ajax').append(html);
  });
}

function sendChatText(){
  var chatInput = $('#chatInput').val();
  if(chatInput != ""){
    $.ajax({
      type: "GET",
      url: "/submit.php?chattext=" + encodeURIComponent( chatInput )
    });
  }
}

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